Flavour enhancers are commonly added to commercially produced food products (eg. frozen dinners, instant soups, snackfoods) to make them taste more 'savoury'.

The commonly used flavour enhancers are:

Australian

• 621 monosodium glutamate, MSG
• 622 monopotassium glutamate
• 623 calcium diglutamate
• 624 monoammonium glutamate
• 625 magnesium diglutamate

European

• E620 Glutamic acid [Flavour enhancer] [possible reaction] [possibly GM]
• E621 Monosodium glutamate [Flavour enhancer] [possible reaction] [LGM]
• E622 Monopotassium glutamate [Flavour enhancer] [possible reaction] [possibly GM]
• E623 Calcium diglutamate [Flavour enhancer] [possible reaction] [possibly GM]
• E624 Monoammonium glutamate [Flavour enhancer] [possible reaction] [possibly GM]
• E625 Magnesium diglutamate [Flavour enhancer] [possible reaction] [possibly GM]
• E626 Guanylic acid [Flavour enhancer]
• E627 Disodium guanylate, sodium guanylate [Flavour enhancer]
• E628 Dipotassium guanylate [Flavour enhancer]
• E629 Calcium guanylate [Flavour enhancer]
• E630 Inosinic acid [Flavour enhancer]
• E631 Disodium inosinate [Flavour enhancer] [possibly of AO]
• E632 Dipotassium inosinate [Flavour enhancer]
• E633 Calcium inosinate [Flavour enhancer]
• E634 Calcium 5'-ribonucleotides [Flavour enhancer]
• E635 Disodium 5'-ribonucleotides [Flavour enhancer] [possibly of AO]
• E636 Maltol [Flavour enhancer]
• E637 Ethyl maltol [Flavour enhancer]
• E640 Glycine and its sodium salt [Flavour enhancer] [possibly of AO]